Furnace door



Nov. 6, 15928.

E. WILLIAMS FURNACE DOOR Filed July 29, .1927

Patented Nov. 6, 1928. I

EDWARD wrnmms, or cnannnnor, PENNSYLVANIA, assrenon r wxnnrnuswnnnme & manuracrunme compan or CHARLEROI, rnnnsvnvanm, A som one HEISSUED TION OF YENNSYLVANIA.

' Application filed July 29,

It is the object of this invention to provide a metal framed, refractor faced, water cooled furnace "door, simp e in structure,-

' in front elevation, but with partof the refractory face broken away. Fig. II is a view in vertical section, on the plane II-II, Fig. I.

- The door of a furnace in which very hightemperatures are maintained,temperatures exceeding the melting point of iron,- the door of an open-hearth furnace, for instance, must in that portion atleast which is ex posed to the atmosphere of the furnace chamber, be formed of highly refractory material. And, practically considered, 1 the material must be fire brick or material .of that class to which the word 'refractory in more specific sense has come to be apphed as its designation. Such material, being of relatively brittle and friable nature, lacking tensile strength and hardness, must, in order to constitute a movable and durable door, be carried in a frame, and the frame must, under practical limitations, be of metal. And the frame of metal must, in order to endure the conditions of service, be made hollow and be cooled by water or equivalent substance circulating within it.

The frame of my'door I make of rolled steel pipe, .and the frame consists of a 'peu ar ripheral portion 1, ordinarily of rectang contour, and of intermediate transverse portions, in the form of one or more bars 2, extending acrpss the space defined by-the peripheral portion and at the ends opening into the pipe sections which constitute the peripheral portion. The transverse bars'are less in thickness, transversely through the door, than is the peripheral portion of the frame, and they are arranged on the outer side, as will be seen on considering Fig. II, so that the conductor walls on one side of the. structure extend in common plane and on the other side form a re-entrant brick-receiving space. Such space may be filled solid with refractory material '3, and the inner face of the finisheddoor may within the peripheral ortionl of the frame present a continuous face of refractory'material.

The transverse bars 2 are spaced apart one 'rummcn noon.

PATENT OFFICE.

1927. Serial No. 209,274.

from another and from the-lengths of pipe of which the peripheral portion 1 is formed, to the end that the refractory body which faces the door on the inside may extend into' and fill the spaces, andthat thusa more securely integrated and more durable door may be produced.

The refractory body '3- will ordinarily be built of bricks of standard size, 9 inches X 4 on the face. Accordingly I preferably form-my'door' of rectangular rolled steel pipe of corresponding size, approximately9 inches X 4 The rectangular periphery 1 of the door frame is formed of lengths of pipe set with the greater dimension (9 inches) ex-- tending in the direction of the thickness of the door. The lengths of pipe which form the transverse bars 2 are set with the smaller dimension (4 inches) extending in the direction of the thicknessof the door, and the greater inthe direction of the lateral extent of the door. The marginal portion extends transversely beyond the intermediate portion by a space interval equal, with tolerance, to

the width of a standard brick. The spaces at which the transverse bars stand apart from one another and from the lengths of pipe which constitute the sides of the door frame are, with 'propertolerance, equal to the breadth of a brick (4 inches). The drawings'show an integrated frame made up of four peripheral lengths of pipe and three intermediate and transverse lengths. In the peripheral lengths openings are cut to re ceive the ends of the transverse lengths, and the components are welded along alllinesof meeting. i a

The body of refractory material is built into the frame, and at roper intervals particular bricks 30 are laid extending length-1 wise throughout the overall thickness of the door (9 inches) and into the spaces between the pipes. Thus the refractory face of the door is'bonded to the metal frame. All the spaces formed by transverse members 2 will preferably be filled with masonry.

Circulation pipes are indicated at 4. The use'of such pipes is familiar. Any preferred arrangement of them may be adopted. With the matter of circulation in mind it will. be remarked that'the door referably stands with the transverse mem ers 2 in vertical position.

- through one o The usual 7 the members 2 and continued through the facing 3.

The door is provided with suspension lugs 6, as is usual.

I claim as, my invention:

1. A supporting grid for brick-work which with the supported brick-work constitutes a furnace door, such grid being formed of lengths of metallic conductor for liquid, fitted together, the structure including a marginal portion and an intermediate portion extend- .ing transversely between opposite members of the marginal portion, the marginal portion extending transversely beyond the intermediate portion by a space interval equal,

.with tolerance, to the width of a standard brick, and the grid spaces being equal, with tolerance, to the width of a standard brick.

2. A supporting grid for brick-work which with the supported brick-work constitutes a furnace door, such grid being formed of lengths of metallic conductor for liquid of Feep hole 5 may be formed cross-sectional dimensions corres ending to the length and width of a stan ard brick, the structure including a marginal portion in which the conductor is arranged with its greater dimension transverse to the general extent of the structure, and an intermediate portion extending transversely between opposite members of the marginal portion, the conductor in such intermediate portion being arranged with its less dimension transverse to the general extent of the structure, the conductor walls on one sideof the structure extending in common plane and on the other side forming a reentrantbrick-receiving space of a. depth equal, with tolerance, to the width of a standard brick, and the grid spaces having a width equal, with tolerance, to the width of a standard brick.

In testimony whereof I have hereunto set my hand.

EDWARD WILLIAMS. 

